package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Employee;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetMealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetMealServiceImpl implements SetMealService {

    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    SetMealDishMapper setMealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐及套餐菜品表
     * 操作多个数据库时,保证是事务
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void addMeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insertMeal(setmeal);
        //返回新增套餐id
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        if(setmealDishes!=null&&setmealDishes.size()>0){
            for(SetmealDish setmealDish:setmealDishes){
                setmealDish.setSetmealId(setmeal.getId());
            }
            setMealDishMapper.insertMealDish(setmealDishes);
        }
    }


    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult()) ;
    }

    /**
     * 批量删除套餐 事务
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //套餐是起售状态不能删
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                //起售中不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //批量删除套餐
        setmealMapper.deleteBatch(ids);
        //批量删除套餐-菜品表
        setMealDishMapper.deleteBatch(ids);
    }

    /**
     * 套餐起售/停售
     * @param status
     * @param id
     */
    @Override
    public void changeStatus(Integer status, Long id) {
        //起售套餐时,判断套餐内是否含有停售菜品,有停售菜品提示
        //"套餐内包含未起售菜品,无法起售"
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList= dishMapper.getBySetMealId(id);
            if(dishList!=null&&dishList.size()>0){
                for (Dish dish : dishList) {
                    if(dish.getStatus()== StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    @Override
    public SetmealVO findById(Long id) {
        Setmeal setmeal=setmealMapper.findById(id);
        //根据菜品id查询口味数据
        List<SetmealDish> setmealDishes=setMealDishMapper.getDishIdsBySetmealId(id);
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 根据id修改套餐
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void updateSetMeal(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //修改套餐表基本信息
        setmealMapper.update(setmeal);
        //删除原有套餐菜品信息
        setMealDishMapper.deleteBySetMeal(setmeal.getId());
        //重新插入套餐菜品数据
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        if(setmealDishes!=null&&setmealDishes.size()>0){
            for(SetmealDish setmealDish:setmealDishes){
                setmealDish.setSetmealId(setmeal.getId());
            }
            setMealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
